Pulverized-coal-burning furnace.



WrM/OLIVER. PULVERIZED COAL BURNING FURNACE.

APPLICATION FILE-D MAR. 2'. 19m

Patented Feb. 19, 1918.

2 SHEETS-SHEET I.

WITNESSES W. M. OLIVER. PULVERIZED COAL sunwms FUR'NAC E.

- APPUCATIQN FILED MAR. 2,19ll.

Patented Feb. 19,1918.

INVENTOR WITNESSE Arromzv UNITED STATES WALTER M. on vnii, F masons, KANSAS.

PULYERIZED-COAL-BURNING FURNACE.

To all to from it may concern Be it known that I, WALTER M. OLIVER, a citizen of the United States, reaiding at Parsons, in-the county of Lahette and State of Kansas, have invented new and useful Improvements in Pulverized-Coal-Burning Furnaces, of which the following is a speck llcation.

lily invention relates; to pulverized coal l'nn'nii'ig tu1.'iuu .:c:-: and un't'icularly 'tgthat. class ot pulrcrunal oal burning furnacesto which the burnt coal brought: into contacta'ith a current of air, and mixed thorn with, and carried in euarwnsion with the air into the cmn mation chamber of the forum..- where it .i ignited and burned.

My invention has for its; objects; first, to providea deflector ]'n.0-pc.rly intern-fixing pulverized coal and air whereby a. mixture of uniform density is procured secondly, to provide a means for regulating the amount of air which passes through the. mixing device, and thirdly, to provide a. device for intermixing pulverized coal and air, by which the mixture will be delivered to the combustion. chamber of the furnace in its most, ellicient. form for burning.

with these and other oh ects in view which willhe lltl'fllnufiolf fully deacrihcd and par-- ticularl v pointed out in thc claim-%, the in 'rc-ntion \"OIISiHlS in thrniccluinisln illustrated in thc accoinpanying drawing forming 2! part. ol thia u'iucxilication and illustrating the prcinrred emlmdimcnt of my invention, in w hi oh i .Figu're 1 is a partially sectional side elevation of a furnace unhod-yiup my invention.

Fig. is-an enlarged sectional side clove--- tion oi the-air and coal mixing device. I

Fig, ?i is a from end elevation of the smile.

Fig. 4 is; a view looking at the opposite end.-

Lilie ('lulractera of referel'iee indiijtat-e like partu'iu the various views.

In the drawin 1 dcaignates a furna e adapted to horn a mixture of pulveric-nal coal and air. Attached to the front wallv 2 of the l'urnasrc a mixing: :'=.luunl.aer1l is: provided. The mixing: chamber; in thc 'prehn'red enrhotlin'icnl illustrated,- consists of a cylitr tlrical 'lll jlHHlll't. havil'zg its ends open. The ends of ho mixing chaiuhcr are designated a5 in the draw inga by i and 5 the end 4 he ing atthe eeznliuat-ion end at the mixing de- Speclflcatton of Letters Patent.

ila-teuted Feb. 19, 1918.

Application filed March 2. 1917. Serial No. 152,086.

vice and the end 5 being at the outer or air inlet end of the mixing cluunher. Leading into the outer or inlet end 5 of the mixing chmnbe' a 'l'oreed air draft. pipe 6 is provided and is disl'ioset'l eoneentrieally of the said open end Brackets 7 are disposed within the mixing chamber and hold said pipe (3 in proper position. Said pipe (1 ter urinates in thc mixing; chamber at a point interuicdialr th t-il ls lllttlluf. The other end of said air pi e is lian 'fiid. as designated at: 1) and is boiled t a flanged air supply pipe i "lhc other end of said air supply pipe llt lllllllillll'!\l.('r w t a a tan or blower ll of usual cmmlrnetion and which is employed tomaintain a onetani rurrcntof airthrough the mixing hamhcr as hercinhelore de scribed.

A halite plate is disposed within the mixing chamber and is composed of two members and 13%. The member 12 is horizontal and overlies the nozzle 8, leaving a paasan c 1-1 between it.- and the upper surface of the mixing chamber. The other member 13 of the hallle plate extends from the com bastion end of the member 12 and extends outwardly lQWuI'tl the combustion end of the mixing 'chamlmr, the combustion end of member I? being. disposed t a lower plane than its othcr cud whereby said member 13' i. poaitioncd in the path of current of air paw-ling through the nozzle. 8. A pasnage 15 la lilUYillVil hrtnrcn the combustion end of the nu-mllcr ti). and the lower surface of the mixing chamber. Directly above the mem her ti-S and extending at right: angles to the member .12 is a t'uel-aupply pipe 16, the out lot end of which ci'tcnds through a holein the side of the mixing chamber and projeets into said. chambers some distance below the .hhmc oi the upper memher 1 The other 0nd of the fuel supply pipe 16 communicates with a hopper 17 of suitable construction for imiintainingr a How. of pulverized fuel through the said. pipe. 1H ie providtai in the mixing chamber where-- hr the interior of said chamber may be in- Hpt'cl'ed. A flange 11-) is provided on said mixing rluunherlsurrouiuling the hole 18 and is adapted to engage a lid 20 whereby the hole may ht:- cloned,

Afiixcd to the mixing, chamber at a pointtherein lit-twmm' the member 13 and the combustion end of the mixing chamber is aballle plate 21, which .IS '[n'elerahly (llSPOfifid upon.

said mixin chamber surface in line with An inspt'zction hole the passage 15. The said baflle plate 21,-

serves to constrict the combustion and. of the mixing chamber whereby" themixtufe of air and pulverized fuel passing therethrough is compressed and a more intense flame is procured 1n the combustion chamber of the furnace.

It will be noted that the air inlet end 5 of the mixing chamber is open, being only restricted by the concentrically disposed air intake pipe .6 as hereinbefore described. This opening is provided so that air may be admitted therethrough into the mixing chamber to either mix with the air issuing from the nozzle 8 and flowing through the passage 15 or to flow through the passage 14 and mingle with the mixture after it has passed the member 13. A damper 22 is provided to close the o enin at the outer end of the mixing cham er. screw threaded stud 23 is mounted upon the mixing chamber and extends outwardly therefrom and engages the ear 24 ofthedamper 22. Wing nuts. 25

"looseningthe wing nuts and moving areprovided and are screw threaded upon the stud 23 and are adapted to clamp the ear 24 between them thereby holding the damper in place. The damper may be adjusted 'by thedamper along the air pipe 6 to the proper positlonand clamping it there by means :of J

c said w'ing nuts.

f-In; the operation of the devicecoal passes through'the fuel supply pipe 16 and dropsdown upon the member 13 where itis scat tered about thereon.

- ing surface of the baflle plate and the draft induced in the'mixing chamber by air being forced through the nozzle 8, the pulverized fuel moves down upon the surfaces 'ofgsaid member 13 until it reaches the lowered e thereof. 'ilheair current passing under t e lower edge of-said member 13 picks up the fuel dropping therefrom and holds the same in suspension: as it travelstoward the combastion Land of the mixing chamber; By reason of the fact that the coalis spread over the surface of the :member 13' and is picked up by theair current when in a scattered condition, a [complete and uniform 'By'reason of the. slant:

- chamber of the furnace and produces an intense heat therein.

It will 'be noted that by the above description the flow of air may be varied by means of the damper 22 independently of the forced draft issuing through the nozzle 8. By this arrangement the flow of air admitted may be varied without interfering with the mixing functions of the device. This aids inaterially in obtaining a proper proportion of air and coal whereby an intense heat may be generated under varigns conditions and with a minimum amount of coal. 7

Having thus fully described my invention, I claim z- 1. .In a device of the character described. a mixing chamber comprising an elongated casing open at both ends, an air draft extending With-in said casing, an inclined baflle plate located within said casing and extending' entirely across the 0 en lnner end of said air draft and means Orprojecting pulverized fuel upon said bafile plate.

2. a device of the characterdescribed,

ing inclined 1n :1 direction opposite to the first mentioned plate and begi'nn-in at a point in vertical alinement with an below said first mentioned late and extending up ward to the disc arge end. of the mixing chamber, wh'ereb the openingof the discharge end oft e mixing chamber is re ""stricted.

a mixing chamber comprising an elongated casing'open at both ends, an air-draft extend- In testimony-whereof Iafiix my signature.

WAIIIER OLIVER. 

